CODEWITHSUNDEEP
r
Starbucks
Starbucks

Reputation: 1568

Changing Classes in Multiple Data Frames

is there a better way to change the class of these dataframes and columns than repeating this? Thanks!

 df46$`Measurement Date` <- as.Date(df46$`Measurement Date`, format = "%Y-%m-%d")
 df45$`Measurement Date` <- as.Date(df45$`Measurement Date`, format = "%Y-%m-%d")
 df44$`Measurement Date` <- as.Date(df44$`Measurement Date`, format = "%Y-%m-%d")
 df43$`Measurement Date` <- as.Date(df43$`Measurement Date`, format = "%Y-%m-%d")
 df42$`Measurement Date` <- as.Date(df42$`Measurement Date`, format = "%Y-%m-%d")
 df41$`Measurement Date` <- as.Date(df41$`Measurement Date`, format = "%Y-%m-%d")
 df40$`Measurement Date` <- as.Date(df40$`Measurement Date`, format = "%Y-%m-%d")

Would using the lapply function make more sense? 

 lapply(df46:df40[`Measurement Date`], Date)

Upvotes: 1

Views: 112

Answers (1)

Vasilis Vasileiou
Vasilis Vasileiou

Reputation: 527

You can try with eval parse:

for (i in 40:46){
  eval(parse(text =
  paste0('df',i,'$`Measurement Date` <-
         as.Date(df',i,'$`Measurement Date`, format = "%Y-%m-%d")')
  ))
}

Upvotes: 4

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